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| 不同两性复配修饰半碳化纤维对Pb2+的吸附差异 |
| Adsorption Difference of Pb2+ by Different Modified Semi carbon Fiber |
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| DOI： |
| 中文关键词: 半碳化纤维 两性复配修饰 Pb2+ 吸附 废水处理 |
| 英文关键词: Semi carbon fiber Complex modification Pb2+ Adsorption Wastewater treatment |
| 基金项目:国家自然科学基金资助项目（41271244）；西华师范大学科研业务基金资助项目（18B023） |
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| 中文摘要: |
| 以聚丙烯腈为原料制备半碳化纤维（SCF），经化学和生物两性修饰后，再以海藻酸钠进行复配修饰，得到不同的两性复配修饰SCF，通过试验考察其对Pb2+的等温吸附和动力学特征，分析pH值、温度和离子强度对Pb2+吸附的影响。结果表明：供试材料对Pb2+的吸附等温线符合Langmuir和Freundlich模型，最大吸附量（qm）为495.09mmol/kg～770.56mmol/kg，两性和两性复配修饰后的SCF对Pb2+的吸附量提高了1.8%～55.6%。pH值升高有利于各供试材料对Pb2+的吸附，离子强度在0.01mol/L～0.5mol/L范围内，各供试材料对Pb2+的吸附量呈现先增加后减小的趋势，并在0.1mol/L时达到最大。热力学参数表明，Pb2+吸附是一个自发、吸热和熵增的过程。 |
| 英文摘要: |
| Semi carbon fiber (SCF) prepared from polypropylene hydrocarbon was chemically and biologically modified, and then complexly modified with sodium alginate. Through experiments, the isothermal adsorption and kinetic characteristics of different modified SCFs on Pb2+were investigated，and the effects of pH value，temperature and ionic strength on Pb2+ adsorption were analyzed. The results showed that the adsorption isotherm of these test materials conformed to Langmuir and Freundlich models，and the maximum adsorption capacity (qm) was from 495.09 mmol/kg to 770.56 mmol/kg. The adsorption capacity of Pb2+ by different modified SCFs increased by 1.8%~55.6%. The increase of pH value was conducive to the adsorption of Pb2+ by various test materials. When the ion strength ranged from 0.01 mol/L to 0.5 mol/L, the adsorption capacity of various test materials increased first and then decreased, and reached the maximum at 0.1 mol/L. The thermodynamic parameters indicated that the adsorption of Pb2+ was a spontaneous，endothermic and entropy increasing process. |
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